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Finding the Fourth Proportional to 3,958.56, 5,940.72 and 1,908

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Solution

The fourth proportional to 3,958.56, 5,940.72 and 1,908 is: 2,863.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,958.56 : 5,940.72 = 1,908 : x
  2. Step 2: Convert to fraction form
    3,958.56/5,940.72 = 1,908/x
  3. Step 3: Cross multiply
    3,958.56x = 5,940.72 × 1,908
  4. Step 4: Simplify right side
    3,958.56x = 11,334,893.76
  5. Step 5: Solve for x
    x = 11,334,893.76/3,958.56
  6. Step 6: Final answer
    x = 2,863.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.